Nadila Eka Putri, T. A. T. . Lubis, Yulia Rustanti, Elitaria Bestri Agustina Siregar, and S. G. DINAMIKA. “The Impact of Covid-19 on Honorary Teachers in Medan City”. Adpebi Science Series, Sept. 2022, http://adpebipublishing.com/index.php/AICMEST/article/view/158.